The Indus River Valley Civilization, also known as Harappan civilization, developed the first accurate system of standardized weights and measures, some as accurate as to 1.6 mm. Harappans created sculpture, seals, pottery, and jewelry from materials, such as terracotta, metal, and stone.Important innovations of this civilization include standardized weights and measures, seal carving, and metallurgy with copper, bronze, lead, and tin. Little is understood about the Indus script, and as a result, little is known about the Indus River Valley Civilization's institutions and systems of governance.Harappan architecture in South Asia was the first use, anywhere in the world, of so-called English bond in building with bricks. Saw, modern: True saws with modern teeth were Harappan invention. Needle's eye: Eye Needle was another Harappan contribution.